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