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