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