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