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