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