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