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