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