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