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