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