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