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