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