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