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