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