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