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