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