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