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)(17,18,23,21)(19,24,28,30)(20,29,27,25)(22,26,32,31)(1,3,5,8)(2,6,7,4)(9,11,12,15)(10,13,14,16)(18,21)(24,30)(25,29)(26,31)(2,7)(3,8)(9,10)(11,13)(12,14)(15,16)(17,19,23,28)(18,24,21,30)(20,22,27,32)(25,31,29,26)(3,8)(4,6)(9,11)(10,13)(12,15)(14,16)(17,20)(18,25)(19,22)(21,29)(23,27)(24,31)(26,30)(28,32) involution — undirected(1,2)(3,4)(5,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,21,23,18)(19,24,28,30)(20,29,27,25)(22,31,32,26)(1,4)(2,3)(5,6)(7,8)(17,22)(18,26)(19,27)(20,28)(21,31)(23,32)(24,25)(29,30) 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.