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