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