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