One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,10,14)(4,7,12,16)(9,13,11,15)(17,18,22,29,24,30,23,28)(19,31,33,25,35,47,34,43)(20,36,38,26,40,48,39,45)(21,27,32,42,41,46,37,44)(1,3)(2,6)(4,11)(5,10)(7,15)(8,14)(9,12)(13,16)(17,19)(18,25)(20,37)(21,39)(22,34)(23,33)(24,35)(26,44)(27,36)(28,47)(29,31)(30,43)(32,40)(38,41)(42,45)(46,48) involution — undirected(1,4)(2,7)(3,9)(5,12)(6,13)(8,16)(10,11)(14,15)(17,20)(18,26)(19,32)(21,34)(22,38)(23,39)(24,40)(25,42)(27,31)(28,36)(29,48)(30,45)(33,41)(35,37)(43,44)(46,47) involution — undirected(4,12)(7,16)(9,11)(13,15)(17,21,23,37,24,41,22,32)(18,27,28,44,30,46,29,42)(19,20,34,39,35,40,33,38)(25,26,31,36,43,45,47,48)(2,8)(3,10)(7,16)(9,11)(17,22,24,23)(18,28,30,29)(19,33,35,34)(20,38,40,39)(21,32,41,37)(25,31,43,47)(26,36,45,48)(27,44,46,42)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.