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