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