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