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