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