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