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