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