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