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