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