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