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