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