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