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