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