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