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