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