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