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