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