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