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