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