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