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