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