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