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