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