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