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