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