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