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