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