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