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