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