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