One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,9)(5,10)(6,7)(11,15)(12,13)(14,16)(33,34)(35,41)(36,37)(38,46)(39,40)(42,47)(43,45)(44,48) involution — undirected(1,3)(2,8)(4,11)(5,7)(6,10)(9,15)(12,16)(13,14)(17,18,22,23)(19,20,24,27)(21,25,29,30)(26,28,31,32)(34,40)(37,41)(42,46)(45,48)(2,6)(3,5)(9,12)(11,14)(18,23)(20,27)(21,29)(26,31)(33,35,39,36)(34,37,40,41)(38,44,47,43)(42,48,46,45)(1,4,7,13)(2,9,6,12)(3,11,5,14)(8,15,10,16)(17,19)(18,20)(21,26)(22,24)(23,27)(25,28)(29,31)(30,32)(33,36,39,35)(34,41,40,37)(38,44,47,43)(42,48,46,45)(1,5,7,3)(2,10,6,8)(4,11,13,14)(9,15,12,16)(17,20)(18,24)(19,23)(21,28)(22,27)(25,31)(26,30)(29,32)(33,37,39,41)(34,36,40,35)(38,45,47,48)(42,44,46,43)(1,6,7,2)(3,10,5,8)(4,12,13,9)(11,16,14,15)(17,21)(18,25)(19,26)(20,28)(22,29)(23,30)(24,31)(27,32)(33,38)(34,42)(35,43)(36,44)(37,45)(39,47)(40,46)(41,48)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.