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