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