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