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