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