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