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