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