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