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