One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,10)(4,12)(13,15)(21,29)(23,30)(26,32)(28,31)(33,34)(35,40)(36,45)(37,42)(38,46)(39,44)(41,48)(43,47) involution — undirected(1,2,6,7)(3,5,10,8)(4,9,12,14)(11,13,16,15)(17,18,22,24)(19,25,27,20)(21,23,29,30)(26,31,32,28)(33,35)(34,37)(36,43)(38,45)(39,42)(40,44)(41,47)(46,48)(1,3,6,10)(2,8,7,5)(4,11,12,16)(9,15,14,13)(17,19,22,27)(18,20,24,25)(21,26,29,32)(23,28,30,31)(33,35)(34,40)(36,46)(37,44)(38,45)(39,42)(41,47)(43,48)(1,2)(3,8)(4,9)(5,10)(6,7)(11,15)(12,14)(13,16)(17,20)(18,19)(21,28)(22,25)(23,26)(24,27)(29,31)(30,32)(33,36)(34,41)(35,43)(37,47)(38,40)(39,48)(42,46)(44,45) involution — undirected(1,4)(2,9)(3,11)(5,13)(6,12)(7,14)(8,15)(10,16)(17,20)(18,19)(21,28)(22,25)(23,26)(24,27)(29,31)(30,32)(33,37,39,40)(34,42,44,35)(36,47,48,38)(41,46,45,43)(1,5,6,8)(2,10,7,3)(4,13,12,15)(9,16,14,11)(17,21)(18,23)(19,26)(20,28)(22,29)(24,30)(25,31)(27,32)(33,38,39,47)(34,43,44,46)(35,45,42,41)(36,40,48,37)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.