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