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