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)(19,24)(20,26)(21,22)(23,25)(27,32)(28,31)(29,30)(2,7)(3,4)(11,15)(14,16)(17,19)(18,24)(20,22)(21,26)(23,28)(25,31)(27,30)(29,32) involution — undirected(1,3,6,4)(2,8,7,5)(9,10)(11,14)(12,13)(15,16)(18,25)(19,28)(22,27)(26,29)(1,4,6,3)(2,5,7,8)(9,11)(10,14)(12,15)(13,16)(17,20)(18,26)(19,27)(21,31)(22,28)(23,30)(24,32)(25,29)(1,5)(2,3)(4,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,21)(18,27)(19,29)(20,24)(22,25)(23,32)(26,28)(30,31) involution — undirected(17,22,23,27)(18,21,25,32)(19,20,28,30)(24,26,31,29)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.