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