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