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