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