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