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