One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,6,8,4)(9,10,12,14)(11,13,15,16)(17,18,24,30)(19,28,22,25)(20,27,21,26)(23,29,32,31)(1,3,5,8)(2,6,7,4)(9,11,12,15)(10,13,14,16)(17,19)(18,25)(20,29)(21,31)(22,24)(23,27)(26,32)(28,30)(2,7)(3,8)(9,10)(11,13)(12,14)(15,16)(17,20,24,21)(18,26,30,27)(19,29,22,31)(23,25,32,28)(3,8)(4,6)(9,11)(10,13)(12,15)(14,16)(17,21,24,20)(18,27,30,26)(19,29,22,31)(23,25,32,28)(1,2)(3,4)(5,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,22,24,19)(18,28,30,25)(20,29,21,31)(23,26,32,27)(1,4)(2,3)(5,6)(7,8)(17,23)(18,29)(19,27)(20,25)(21,28)(22,26)(24,32)(30,31) involution — undirectedA 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.