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