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