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