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