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