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