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