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