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)(17,18,23,24)(19,21,20,25)(22,26,30,31)(27,29,28,32)(1,2)(3,6)(4,7)(5,8)(9,13)(10,14)(11,12)(15,16)(18,24)(19,20)(26,31)(27,28)(33,34)(35,42)(36,39)(37,40)(38,41)(43,47)(44,45)(46,48) involution — undirected(3,9)(6,13)(10,15)(14,16)(17,19,23,20)(18,25,24,21)(22,27,30,28)(26,32,31,29)(33,35,38,40)(34,37,41,42)(36,44,46,43)(39,47,48,45)(1,2)(3,6)(4,11)(5,8)(7,12)(9,13)(10,16)(14,15)(17,20,23,19)(18,21,24,25)(22,28,30,27)(26,29,31,32)(33,34)(35,37)(36,39)(38,41)(40,42)(43,45)(44,47)(46,48)(1,3)(2,6)(4,10)(5,9)(7,14)(8,13)(11,16)(12,15)(17,21)(18,19)(20,24)(22,29)(23,25)(26,27)(28,31)(30,32)(33,36,38,46)(34,39,41,48)(35,43,40,44)(37,45,42,47)(1,4,5,12)(2,7,8,11)(3,10,9,15)(6,14,13,16)(17,22,23,30)(18,26,24,31)(19,27,20,28)(21,29,25,32)(33,37)(34,40)(35,41)(36,45)(38,42)(39,44)(43,48)(46,47)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.