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