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