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