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