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