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