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)(11,15)(12,14)(13,16)(17,18,23,27)(19,24,29,20)(21,25,30,32)(22,31,28,26)(1,3,4,8)(2,5,6,7)(9,11,12,16)(10,13,14,15)(17,19,23,29)(18,24,27,20)(21,22,30,28)(25,31,32,26)(1,2)(3,5)(4,6)(7,8)(11,16)(13,15)(17,20,22,32,23,24,28,25)(18,21,26,19,27,30,31,29)(2,6)(5,7)(10,14)(13,15)(17,21,23,30)(18,25,27,32)(19,28,29,22)(20,31,24,26)(3,8)(5,7)(19,29)(20,24)(21,30)(25,32) 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.