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