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