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)(18,22)(19,25)(24,29)(27,30)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,18)(19,26)(20,22)(21,29)(23,27)(24,28)(25,32)(30,31)(9,12,13,11)(10,14,15,16)(17,19,20,25)(18,23,22,31)(21,30,28,27)(24,32,29,26)(18,24)(21,28)(22,29)(23,32)(26,31)(27,30) involution — undirected(1,3,4,7)(2,6,5,8)(19,25)(23,31)(26,32)(27,30)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.