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