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