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)(19,28)(20,33)(21,25)(22,27)(23,30)(24,35)(26,37)(29,38)(31,40)(32,39)(34,41)(36,42)(43,45)(44,47)(46,48) involution — undirected(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,19,22,32)(18,23,27,40)(20,29,36,46)(21,31,37,30)(24,38,41,48)(25,28,26,39)(33,43,42,47)(34,45,35,44)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,20,22,36)(18,24,27,41)(19,29,32,46)(21,34,37,35)(23,38,40,48)(25,33,26,42)(28,43,39,47)(30,44,31,45)(9,11)(10,14)(12,15)(13,16)(17,21,22,37)(18,25,27,26)(19,30,32,31)(20,34,36,35)(23,39,40,28)(24,33,41,42)(29,44,46,45)(38,47,48,43)(11,15)(14,16)(17,21,22,37)(18,25,27,26)(19,31,32,30)(20,34,36,35)(23,28,40,39)(24,33,41,42)(29,45,46,44)(38,43,48,47)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.