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