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