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