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