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