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