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