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