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