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