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