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