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