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