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