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