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