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)(19,20)(21,25)(22,26)(23,28)(24,34)(27,37)(29,32)(30,33)(31,35)(36,43)(38,44)(39,47)(40,45)(41,46)(42,48) involution — undirected(1,3,6,13)(2,7,9,11)(4,12,5,14)(8,15,10,16)(17,19,23,31)(18,20,28,35)(21,29,37,24)(22,38,41,42)(25,32,27,34)(26,44,46,48)(30,36,47,40)(33,43,39,45)(1,4,6,5)(2,8,9,10)(3,12,13,14)(7,15,11,16)(17,20)(18,24)(19,25)(21,32)(22,39)(23,35)(26,38)(27,31)(28,29)(30,45)(33,41)(34,37)(36,48)(40,44)(42,46)(43,47)(2,9)(7,11)(8,10)(15,16)(17,21,23,37)(18,25,28,27)(19,29,31,24)(20,32,35,34)(22,36,41,40)(26,43,46,45)(30,38,47,42)(33,44,39,48)(1,5,6,4)(2,10,9,8)(3,12,13,14)(7,15,11,16)(17,22)(18,26)(19,30)(20,33)(21,36)(23,41)(24,42)(25,43)(27,45)(28,46)(29,38)(31,47)(32,44)(34,48)(35,39)(37,40)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.