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