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