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