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