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