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