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