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)(19,22)(20,23)(21,24)(25,26)(27,32)(28,31)(29,30)(33,34)(35,41)(36,37)(38,42)(39,48)(40,44)(43,45)(46,47) involution — undirected(1,3,7,6)(2,8,9,12)(4,13,14,11)(5,15,16,10)(17,19)(18,22)(20,26)(21,29)(23,25)(24,30)(27,31)(28,32)(33,35)(34,41)(36,43)(37,45)(38,48)(39,42)(40,46)(44,47)(2,9)(4,14)(8,12)(11,13)(18,20)(19,25)(24,28)(27,29)(33,36,40,38)(34,42,44,37)(35,43,46,48)(39,47,45,41)(1,4,7,14)(2,10,9,15)(3,13,6,11)(5,12,16,8)(17,20,23,18)(19,26,25,22)(21,28,31,24)(27,30,29,32)(33,37,40,42)(34,36,44,38)(35,45,46,39)(41,43,47,48)(1,5)(2,11)(3,10)(4,12)(6,15)(7,16)(8,14)(9,13)(17,21,23,31)(18,24,20,28)(19,27,25,29)(22,32,26,30)(33,38,40,36)(34,42,44,37)(35,43,46,48)(39,41,45,47)(1,6,7,3)(2,12,9,8)(4,11,14,13)(5,10,16,15)(17,22,23,26)(18,25,20,19)(21,30,31,32)(24,27,28,29)(33,39,40,45)(34,43,44,48)(35,42,46,37)(36,47,38,41)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.