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