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