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