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