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