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