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