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