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)(19,26)(20,23)(21,29)(22,25)(24,30)(27,31)(28,32)(33,34,38,42)(35,40,36,39)(37,41,46,45)(43,48,44,47)(2,7)(3,9)(10,15)(11,16)(35,36)(39,40)(43,44)(47,48) involution — undirected(17,19,22,20)(18,23,25,26)(21,27,30,28)(24,31,29,32)(33,35,38,36)(34,39,42,40)(37,43,46,44)(41,47,45,48)(1,3,6,9)(2,8,7,4)(5,11,14,16)(10,13,15,12)(17,20,22,19)(18,23,25,26)(21,28,30,27)(24,31,29,32)(33,36,38,35)(34,40,42,39)(37,43,46,44)(41,47,45,48)(1,4,6,8)(2,9,7,3)(5,13,14,12)(10,11,15,16)(17,18)(19,23)(20,26)(21,24)(22,25)(27,31)(28,32)(29,30)(33,37,38,46)(34,41,42,45)(35,43,36,44)(39,47,40,48)(1,5,6,14)(2,10,7,15)(3,11,9,16)(4,12,8,13)(17,21)(18,24)(19,27)(20,28)(22,30)(23,31)(25,29)(26,32)(33,34)(35,39)(36,40)(37,45)(38,42)(41,46)(43,48)(44,47)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.