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