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