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