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