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