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