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