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